What dosage of citerazine would you give to a chihuahua who weighs 4.3 kg?

The typical dosage of cetirizine for dogs is about 1 mg per kilogram of body weight. For a chihuahua weighing 4.3 kg, the recommended dosage would be approximately 4.3 mg. It's important to round this to a practical dosage form, so you could administer 5 mg, but always consult with a veterinarian before giving any medication to ensure safety and appropriateness for your pet's specific condition.